William h



(No Model.)

W. H. WRIGHT.

P-RINTERS QUOIN.

N OTHERS. PhorvLnhog'phur. washlnglon, D. C

Patented Apr. 5, 1887.

UNITED STATES PATENT OFFICE.

VILLIAM H. WRIGHT, OF FREI-EPORT, ILLINOIS, ASSIGNOR TO .DVIGHT B. BREED AND JOSEPH H. KELLOGG, BOTH OF SAME PLACE.

PRINTERS QUOIN.

SPECIFICATION forming part of Letters Patent No. 360,501, datei-1. April 5, 1887.

Application filed April 20, 1886.

T0 @ZZ whom t may concern:

Be it known that I, WILLIAM H. WRIGHT, a resident of Freeport, in the county of Ste phenson and State of Illinois, have invented certain new and useful Improvements in Printers7 Quoins; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in printers7 quoins of that class in which each complete quoin is made up of two Wedgeshaped blocks provided with means for sliding each longitudinally upon the other.

The invention is fully described and explained inthis specification, and shown in the accompanying drawings, to which this speciieation refers.

Figurel is a side view of apa-ir of quoinsprovided with my devices; Fig. 2, an end view of the same, looking from the right; Fig. 3, a plan ofthe part l, Fig. l, seen in the direction of the arrow m. Fig. 4 is a section on the lineas y, Fig. 3. Fig. 5 is a section on the line xy, Fig. 3. Fig. 6 is a View of the part 2, Fig. l, seen in the direction of the arrow m. Fig. 7 shows the method of attaching the quoins to any bar of proper construction.

In the drawings, l and 2 are two quoins` adapted by inclined contiguous faces to slide upon each other in the usual manner, varying the distance between the exterior faces, which are parallel at all times. One of these quoins has a dovetail central rib, 4, extending from end to end of its inclined face, and the otheris provided with a corresponding groove, 14, Fig. 6, in which the rib 4 slides. IV lien the quoins are engaged or united by means of the tongue and groove, constructed as set forth, it is evident that they can be separated only by longitudinal motion with reierence to each other. Such separation is prevented by a pin, 7, Figs. l, 2, 3, fixed transversely in the tongue or rib 4, near one extremity, and by a projection, 8, upon the quoin 2, Figs. 2 and 6,.sliding in a groove, l0, Figs. 2 and 3, in the upper surface of the tongue 4. This projection 8 is at one end ofthe quoin 2, and the groove 10 extends from the corresponding end of the tongue 4 nearly, butnotquite,tothcopposite end. It fol- Serlal No. 199,554. (No model.)

lows that the quoin 2 may slide upon the quoiu 1 in onedirection until the projection 8 reaches the end ofthe groove 10 in the tongue 4, and in the opposite direction until the end of the block 2 meets the pin 7. To allow the latter motion to continue till theends of the two quoins are in the same plane, the quoin 2 is provided with a recess, l2, Fig. 6, for the passage of the pin 7 into the quoin 2 to a distance equal to its own distance from the end ofthe quoin l. The quoin l is further provided with a dovetail groove, 11, Figs. 2, 4, and 5, formed in the side opposite the tongue4 and having the same or substantially the same crosssection as that of the tongue, as illustrated in Fig. 4.

It is evident that a series of quoins having the cross-section shown in Fig. 4 may be builtup to form a compound quoin of any desired size, the tongue of each quoin of the series en` tering and interlocking with the groove of the quoin next it, and the whole quoiu so formed being adapted to connect with a complementary quoin having the form2. In the building up of a compound quoin as suggested, each of the single quoins used may be wedge-shaped, like the quoin l, (shown,) or a part of the quoins may be parallel-sided. Y3y another and somewhat similar use of the groove ll (illustrated in Fig. 7) a pair of quoins may be se cured as a whole upon a straight bar, l5, of any desi red length, having a tongue,16,adapted to fit said groove. Any number of pairs of quoins may be placed upon the bar, and the whole be handled as a unit where it is desired to repeatedly lock forms of nearlythe same size.

I am aware that a wedge-shaped quoin has been formed with a groove ou one face to re ceive the tongue of a supplemental wedgeshaped quoin, and with a groove, or its equivalent, in its opposite face, to receive the tongue ofaside-stick corresponding to the bar l5. So long as the only object ofthe dovetails on the quoin is to lock it on one side to asinglc supplemental quoin and on the other side to a single bar or sidestick, it is immaterial whether the quoin has both faces tongued or both grooved or one tongued and thcothergrooved.

For the more important purpose, however, of

building up a compound quoin from a series ofsingle quoins, the form ofthe quoin l (shown ICO in the drawings) is a material improvement over any prior construction with which I am acquainted.

Any means may be employed for actuating each pair of quoins, Whether separate or upon a bar, 15, provided that sufficient material be left in one quoin to allow the formation of the groove 11.

In the drawings one quoin is shown as provided with teeth 5, forming arack upon its inclined face, and the other is provided with Va recess, 3, Figs. 1 and 3, adapted to receive a pinion-key, 6, Fig. 1, which engages the rack 5 and byits rotation forces the quoin2 in either direction, as desired.

Operative forms of my devices are shown; but I do not wish to limit myself to the precise forms illustrated, since mere mechanical skill may produce many substantially equivalent combinations. The grooves and stops may each be varied in form and position and still embody operative forms of my invention, although tlie forms set forth are believed to be the most advantageous.

Having now fully illustrated and described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The grooved quoin 2, having a stop, 8, and 

